attribute

A named value or relationship that exists for some or
all instances of some entity and is directly associated
with that instance.

Examples include the href attribute of an HTMLanchor
element, the columns of a databasetable considered as
attributes of each row, and the members (properties and
methods of an object in OOP. This contrasts with the
contents of some kind of container (e.g. an array), which are
typically not named. The contents of an associative array,
though they might be considered to be named by their key
values, are not normally thought of as attributes.